JPH072033Y2 - Ozone decomposition filter - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to an ozone decomposing filter that decomposes ozone contained in the air and also has a dust removing effect.

[Problems to be solved by conventional techniques and devices]

Generally, in an electronic copying machine, ozone is generated by corona discharge of a corona charger for charging and discharging a photoconductor, and the air containing the generated ozone is discharged from the electronic copying machine to the outside.

Ozone is well known for its bactericidal effect, but it becomes a harmful gas to the human body when it exceeds a certain concentration, that is, 0.1 ppm.

In this way, when the concentration of ozone in the atmosphere increases, environmental hygiene is deteriorated.
The recommended value is specified to be below ppm. As a means for removing such harmful ozone from the atmosphere, for example, there is found one formed by attaching activated carbon to a foamed urethane foam with a binder. The deodorization mechanism of an ozone removal filter using activated carbon is a mechanism that traps and holds odors in the fine pores in the activated carbon and closes the pores.
Therefore, if the rate at which the pores are clogged increases, there is a drawback that the deodorizing ability is lost and the life is short.

Further, as a means for solving the above-mentioned drawbacks, there is seen one utilizing a deodorizing mechanism by an oxidizing action using a catalyst. For example, as shown in JP-A-58-81425, there is seen a product obtained by adhering a white metal element or manganese oxide to a phenol-based activated carbon fiber or a non-woven fabric composed of this fiber and another fiber. However, since the ozone removing device uses a nonwoven fabric made of hard and thin activated carbon fiber, the density is increased by heating and pressure bonding, and the contact area is increased, but the pressure loss is increased in combination with the impregnation fixation of the catalyst and the electronic There are problems that the copying machine is filled with air and that the toner discharged from the copying machine causes clogging immediately.

[Means for Solving the Problems]

The present invention improves the above-mentioned problems, and includes porous fibers such as regenerated cellulose fibers, nylon, acrylic,
2 μm diameter in porous water-absorbing / perspiring fiber such as polyester
80:20 to 50:50 a fiber having a function of ozone decomposition and a heat-fusible polyester fiber which are mixed with the following heavy metal manganese dioxide oxidation catalysts and have the oxidation catalyst exposed and retained in the fiber surface and in the porous structure. The problem is solved by forming a bulky fiber web formed by mixing in the following ratio and performing heat treatment to obtain a nonwoven fabric-like ozone decomposition filter in which fibers are fused and fixed to each other.

Hereinafter, the present invention will be described in more detail with reference to examples.

〔Example〕

 Heavy metal dioxide mainly composed of manganese dioxide and copper oxide
Manganese oxidation catalyst CARULITE  (CARUS CHEMICAL Co.
(USA)] regenerated cellulose, eg rayon 100 weight
Porous hygroscopic property formed by spinning 50 parts by weight per part
With ozone decomposing function and low melting point posester fiber
The fibers are mixed in the following composition to form a land web.

Regenerated Cellulose Fiber (Rayon) 15d × 51mm 80% Low Melting Point Polyester Fiber 10d × 51mm 20% Fiber Unit Weight 300g / m ² The low melting point polyester fiber is obtained by heat-treating the land web obtained with the above fiber blend at 150 ° C. The ozonolysis catalyst having a thickness of 5 to 10 mm was formed by melting and fusing the fibers cross-contacting each other.

As shown in FIG. 1 and FIG. 2, the obtained ozone decomposition filter holds the heavy metal manganese dioxide oxidation catalyst (3) exposed on the fiber surface or inside the porous surface of the regenerated cellulose fiber (2) having the porous structure (1). The low melting point polyester fiber (4) mixed as the heat fusion fiber and the portion (5) which cross-contacts with each other are adhered by the melting of the polyester fiber by heating to form a bulky ozone decomposition filter.

As the constituent material of the ozone-decomposable fiber, hydrophilic nylon, acryl, polyester and the like can be similarly used in addition to the regenerated cellulose.

[Comparative Example 1] Polyester fiber 12d × 51 mm 50% and nylon fiber 20d × 38
A random web having a basis weight of 100 g / m ² is formed by using mixed fibers with 50% of mm, and a resin having the following composition is applied by spraying to obtain a temporary fixing base material.

Resin formulation Polyvinyl alcohol 100 parts Melamine 70 parts Crosslinking agent 35 parts Dispersion amount 20g / m ² Next, after impregnating with a resin solution consisting of the following composition, it was heated and dried to form an ozone decomposition filter with a finished weight of 420g / m ² . .

Water-soluble phenol 50 parts Ozone decomposition catalyst 100 parts Adhesion amount 300 g / m ² The ozone decomposition test results for the performance comparison of the ozone decomposition filters obtained in the above Examples and Comparative Examples are shown in the table below.

As a result of the test, the filter of the present invention has an excellent ozone removal ability, and since there is no binder in the filter structure, the pressure loss is small and the filter has a long life.

[Effect of device]

Since the present invention is configured as described above, compared to the conventional ozone removal filter using activated carbon, it is not due to adsorption but due to catalytic decomposition action, and due to the porous structure, the dust holding capacity is also increased and the life is greatly extended. Extended.

Further, since the ozone decomposition catalyst is mixed during the formation of the porous fiber and is exposed and contained on the fiber surface and the porous surface of the formed porous fiber, the catalyst is not covered by the resin, so that the catalyst effect No decline is seen. In addition, since it has a non-woven fabric structure, it is also a device having an effect of having a dust removing effect as well.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic sectional view of an ozone decomposing filter of the present invention, and FIG. 2 is a partially enlarged perspective view of a regenerated cellulose fiber holding a catalyst used in the present invention. (1) …… Porous structure (2) …… Regenerated cellulose fiber (3) …… Heavy metal manganese dioxide oxidation catalyst (4) …… Low melting point polyester fiber (5) …… Cross contact part

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display location D06M 11/36

Claims (3)

[Scope of utility model registration request] 1. A fiber having an ozone decomposing function for exposing and retaining an ozone decomposing catalyst comprising a metal oxide on the surface of the fiber and inside the porous material when forming a porous water-absorbing / perspiring fiber, and a heat-fusible fiber. An ozone decomposing filter, characterized in that the constituent fibers of the bulky fiber layer formed by are fused together. 2. The ozone decomposition filter according to claim 1, wherein the ozone decomposition catalyst is a heavy metal manganese dioxide oxidation catalyst composed mainly of manganese dioxide and copper oxide. 3. The ozone decomposing filter according to claim 1, wherein regenerated cellulose, hydrophilic nylon, acryl or polyester is used as the resin material forming the porous water absorbing / perspiring fiber.